Added note for setting the desk number to 0.

app/src/apps/classroom_compliance/EditStudentView.vue

@@ -103,6 +103,9 @@ function resetForm() {
       <div>
         <label for="desk-input">Desk Number</label>
         <input id="desk-input" type="number" v-model="formData.deskNumber" />
+        <p style="font-style: italic; font-size: smaller;">
+          Set desk number to zero to remove a student's desk assignment.
+        </p>
       </div>
       <div>
         <label for="removed-checkbox" style="display: inline">Removed</label>